Headphone



FIG. 1 is a perspective view of a headphone showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Portions in broken lines in FIGS. 1-7 are for illustrative purpose only and form no part of claimed design. 

The ornamental design for a headphone, as shown and described. 